Patents by Inventor Ham Donhee

Ham Donhee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Hybrid Pll Combining Fractional-N & Integer-N Modes of Differing Bandwidths
    Publication number: 20090184773
    Abstract: A single-loop PLL that operates in a narrower-bandwidth, integer-N mode during phase lock and in a wider-bandwidth, fractional-N mode during transient. This hybrid PLL simultaneously achieves the fast-locking advantage of the fractional-N PLL and design simplicity of the integer-N PLL. The frequency division mode switching facilitates a digital protocol to execute bandwidth switching, which increases the degree of design freedom for the bandwidth switching.
    Type: Application
    Filed: March 9, 2007
    Publication date: July 23, 2009
    Applicant: President and Fellows of Harvard College
    Inventors: Kyoungho Woo, Ham Donhee